21296289

素因数分解:

$3^1\times 7^1\times {\mathrm{653}}^1\times {\mathrm{1553}}^1$

素因数の和:2216

約数の個数: 16

約数和(自身を含む): 32522112

約数和(自身を除く): 11225823

約数列:

[1, 3, 7, 21, 653, 1553, 1959, 4571, 4659, 10871, 13713, 32613, 1014109, 3042327, 7098763, 21296289]

約数ペア:

[(1, 21296289), (3, 7098763), (7, 3042327), (21, 1014109), (653, 32613), (1553, 13713), (1959, 10871), (4571, 4659)]